def generate_policy_update_report(original_policy, updated_policy):
    """
    生成策略更新报告
    :param original_policy: 原始策略
    :param updated_policy: 更新后的策略
    :return: 报告
    """
    report = {
        "original_policy": original_policy,
        "updated_policy": updated_policy,
        "changes": []
    }
    for key in original_policy:
        if original_policy[key] != updated_policy[key]:
            report["changes"].append(f"Updated {key} from {original_policy[key]} to {updated_policy[key]}")
    return report

# 示例
original_policy = define_security_policy()
updated_policy = update_security_policy(original_policy, {"encryption": False})
report = generate_policy_update_report(original_policy, updated_policy)
print(f"Policy update report: {report}")